1289944 has 16 divisors (see below), whose sum is σ = 2430720. Its totient is φ = 641760.

The previous prime is 1289933. The next prime is 1289963. The reversal of 1289944 is 4499821.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854 + ... + 3274.

It is an arithmetic number, because the mean of its divisors is an integer number (151920).

2^1289944 is an apocalyptic number.

It is an amenable number.

1289944 is a deficient number, since it is larger than the sum of its proper divisors (1140776).

1289944 is a wasteful number, since it uses less digits than its factorization.

1289944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 806 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 1289944 is about 1135.7570162671. The cubic root of 1289944 is about 108.8571481058.

The spelling of 1289944 in words is "one million, two hundred eighty-nine thousand, nine hundred forty-four".